2. Tactical Design Improvements (18+ Key Patterns & Concepts)

Objects defined by a unique identity that persists over time, rather than by their attributes (e.g., a Customer or an Order).

Eric Evans realized that the biggest challenge in software isn't the technology—it's the communication. Technology changes (from Monoliths to Microservices), but the problem of translating business requirements into code remains the same.

When debugging a complex architectural boundary or arguing for an Anti-Corruption Layer during a code review, the ability to instantly search the text for Evans' specific definitions is invaluable.